$con = mysqli_connect("localhost","root","","final_osa");
if (mysqli_connect_errno($con))
{
    echo "Failed to connect to DataBase: " . mysqli_connect_error();
}else
{
    $data_points = array();
    $result = mysqli_query($con, "SELECT * FROM scholars_list");
    while($row = mysqli_fetch_array($result))
    {        
        $point = array("label" => $row['course'], "y" => $row['student_name']);
        array_push($data_points, $point);        
    }
    echo json_encode($data_points, JSON_NUMERIC_CHECK);
}
mysqli_close($con);

我怎样才能做一个饼图来显示一门课程中有多少学生被学者录取的百分比？谢谢
这是我的js$（document）.ready（function（）{

$.getJSON("data.php", function (result) {
                var chart = new CanvasJS.Chart("chartContainer", {
                    animationEnabled: true,
                    exportEnabled: true,
                    data: [
                        {
                            type: "pie",
                            showInLegend: "true",
                            legendText: "{label}",
                            indexLabelFontSize: 16,
                            indexLabel: "{label} - #percent%",
                            yValueFormatString: "฿#,##0",
                            dataPoints: result
                        }
                    ]
                });
                chart.render();
            });
        });